Alfred roesch



A. ROESCH.

REGULATING VALVE.

APPLICATION FILED AUG- 1. 191a.

Patented May 20, 1919.

CM 1101mm UNITED STATES PATENT OFFICE.

ALFRED ROESCH, OF BROOKLYN, NEW YORK, ASSIGNOR TO CHARLES J. TAG-LIAIBUE MANUFACTURING (.70., OF BROOKLYN, NEW YORK, A CORPORA' OF NEW YORK.

REGULATING-VALVE.

Specification of Letters Patent.

Patented May 20, 1919.

Application filed August 1, 1916. Serial No. 112,489.

To all whom it may concern:

Be it known that I, ALFRED RoEsoH, a

citizen of the United States, and resident of the boron h of Brooklyn, county of Kings, city an State of New York, have invented certain new and useful Improvements in Regulating-Valves, of which the following is a specification.

My invention relates to regulating valves and has for its object to provide a simple and efiicient construction whereby temperature or pressure at or beyond the exit side of the valve may be automatically regulated in a predetermined manner to maintain said temperature or pressure at a substantially constant point. My invention further contemplates a structure in which the necessity for the customary more or less complicated arrangements, including levers, fulcrums, weights and the like is avoided and in which resistance to .the intended operation due to friction is reduced to a minimum. Another object of my improvement is to provide a valve of the kind mentioned in which the range of action is increased to a maximum extent. My invention will be fully described hereinafter and the features of novelty will be pointed out in the'appended claims.

In the accompanying drawings which illustrate an example of my invention,

Figure 1 is an elevation of my improved valve partly in section; Fi 2 is a sectional view on the line 2-2 of Fig. 1; Fig. 3 is a plan view, and Figs. 4 and 5 are detail views illustrating the device when used for temperature and pressure regulating respec-, tively.

Referrin to the drawings, 5 represents a valve casing or bonnet divided interiorly into an inlet chamber 6 and an .outlet cham her 7, the inlet chamber 6 being connected by means of a pipe 8 with the source of a medium for producing temperature variations or with a source of premure whilethe outlet chamber 7 communicates with a pipe 9 leading to any pointat which the temperature is to be regulated or the medium under pressure is to be utilized. The chambers 6 and 7 are connected with each other by means of passages 10 controlled by a double valve 11 of any well known piston type, said valve being carried by a stem 12 which extends throu h and is slidable in the customary stufling 0x or the llke 13.

The said stem 12 at its outer end s connected with a movable yoke 14 constructed as shown, for instance, in the form of a rectangle and resting upon the projection 15 of a main bellows 16 as shown in Fig. 1. Thisprojection 15 is formed with an inter: nal passage which is sealed at its outer end and communicates with the interior of the main bellows 16 and with a connection 1? arranged to be connected or communicating with a source of pressure and controlled by a valve 18, a gage 19 for indicating the degree of pressure being preferably included in the connection 17 at a suitable point. The said bellows 16 is supported by or restsupon a cross piece 20 forming part of a fixed yoke 20 which, as shown, is rigidly connected with and supported by the valve casing 5 or more specifically by the stufling box 13 thereof. It will be seen that the movable yoke 14 and the fixed yoke 20 extend transversely to each other with the upper member of the movable yoke 14 extending through the fixed yoke 20 and the member 20 of the latter projecting through the movable yoke 14. The arrangement further includes an auxiliary bellows 21 supported upon the upper member of the movable yoke 14 and located between the latter and the upper member of the fixed yoke 20, as shown best in Fig. 1'. In the illustrated example which as shown in Figs. 1, 2, 3 and 4, is intended for temperature regulation the auxiliary bellows 21 is connected by means of a tube 22, which may extend through the upper member of the fixed yoke 20,.with the bulb 23 containing a fluid which expands and contracts under the influence of variationsin temperature and located in the pipe 9 leading from the exit side of the valve casing 5, the said fluid being also contained in the tube 22 and auxiliary bellows 21. If the device is to be used for regulating pressure the tube 22 may simply be connected with the pipe'9, the bulb 23 being omitted.

If the device is used for the purpose of automatically regulating the temperature at the exit side of the valve'or beyond the same, the main bellows 16 is inflated and expanded to a predetermined extent depending upon the temperature to be maintained whereby the valve 11 is opened a sufficient distance to permit the temperature producing medium to pass into the pipe 9 in the quantity necessary to maintain this temperature while the fluid in the bulb 23, tube 22 and bellows 21 is compressed to balance the pressure in the bellows 16. It will be noted that the said bulb 23 is in the direct path of the temperature producing medium passing through the pipe 9. If for any reason the temperature at the bulb 23 rises beyond the desired point the fluid in said bulb will expand thus causing the fluid in the tube 22 and bellows 21 to eXert a pressure on the latter whereby said bellows 21 is expanded. The expansion of the bellows 21 is communicated to the yoke 14 and by it to the bellows 16 thus causing the latter to be compressed and the valve 11 moved toward its closed position or completely closed as the case may be. In either instance the flow of temperature producing medium is either reduced or completely cut off until the temperature at the bulb 23 has dropped to the desired point, whereupon the fluid in said bulb contracts back to its initial condition and the coiiperating parts also resume their initial positions. If the temperature at the bulb 23 falls below the desired point the fluidin said bulb contracts thus reducing the pressure in the auxiliary bellows 21 and permitting the main bellows 16 to expand beyond their normal condition. This causes the valve 11 to be opened up and permits an increased flow of tem perature producing medium, which condition remains until the temperature at the bulb 23 has again reached the desired point whereupon the cooperating parts all return to the normal positions. These operations are repeated as the temperature at the bulb 23 rise/Sand falls beyond the desired point so that the temperature at said bulb is auto matically maintained at a substantially constant predetermined point. Any degree of temperature may be maintained at the bulb by simply varying the extent or degree of inflation of the main bellows 16, which is accurately registered by the gage 19.

As another example of the operation, in case the device is used as a pressure regulating medium it may be assumed that the inlet chamber 6 is connected, through the medium of the pipe 8, with a source of pressure producing medium exerting a pressure of one hundred and twenty five pounds and that a pressure of twenty pounds is desired on the exit side of the valve, or in other words in the pipe 9. In such case, the main bellows 16 is inflated through the connection 17 until the gage 19 registers a pressure of twenty pounds or in other words until a pressure equaling twenty pounds is present 1n the main bellows 16, after which said bellows 16 is sealed by closing the valve-18.

This inflation causes said bellows 16 to expand between the fixed member 20 of the fixed yoke 20 and the upper member of the movable yoke 14. As the expansion of said main bellows 16 in a direction toward the valve casing 5 is resisted by the fixed member 20 the movable yoke 14 will be moved in a direction away from the valve casing 5 and will similarly move the stem 12 thus actuating the double valve 11 and opening the communication between the two chambers 6 and 7 through the passages 10. This actuation of the valve 11 will besuch that the one hundred and twenty five pounds pressure existing in the inlet chamber 6 will be reduced to twenty pounds in the outlet chamber 7 which pressure will therefore also exist in the pipe 9. At the same time this pressure of twenty pounds will be communicated to the auxiliary bellows 21 through the tube 22, it being understood that in this Case the b lb 23 is omitted and that the tube 22 communicates directly with the interior of the pipe 9, for instance as shown in Fig. 5, so that both bellows are balanced and the described adjustment of the valve is secured and maintained. This condition of the parts remains as long as the pressure in the outlet chamber 7 and pipe 9 remains at twenty pounds. If, for any reason, the pressure in the pipe 9 rises above twenty pounds, this increased pressure will be communicated to the auxiliary bellows 21 through the tube 22 and will thus expand the same. As the expansion of said bellows 1 21 in one direction is resisted by the upper member of the fixed yoke 20 and in the other direction by the main bellows 16 the result will be that the increased pressure in the auxiliary bellows 21 which now is greater than that in the main bellows 16 will overcome the resistance of the latter which as a result will be partially collapsed thus either partly or entirely closing the valve 11. In this manner the pressure passing from the chamber 6 to the chamber 7 is either entirely cut off or reduced, this condition continuing until the pressure in the pipe 9 is again reduced to twenty pounds, whereupon the bellows 16 and 21 will again be balanced and will adjust themselves to bring the parts back to their initial positions. If, on the other hand, the pressure in the pipe 9 falls below twenty pounds, the resistance offered by the auxiliary bellows 21 to the expansion of the main bellows 16 will be reduced so that the latter will, under the force of its internal pressure, expand somewhat beyond its lnitial position and will thus raise the valve 11 and open it further. As soon as the 1" that my improved construction provides anefiicient temperature regulator and an efficient reducing valve which is simple in construction and in which the use of levers, fulcrums, weights and the like is entirely avoided, thus reducing the frictional resistance to the operation of the valve to a minimum. My improved construction is also extremely cheap to manufacture,.is not easily disarranged, needs no specially skilled attention and increases the operative range of a given valve to a maximum extent.

My improved valve may be used wherever a substantially constant temperature or pressure is desired without regard to the degree of the temperature producing medium or of pressure emanating from the source and is thus of value in connection with many industries.

Various changes in the specific form used and described may be made within the scope of the claims Without departing from the spirit of my invention.

I claim 1. The combination of a valve casing having an inlet and an outlet, a valve in said casing controlling the communication between said inlet and outlet, a main bellows operatively connected with said valve and inflated to a predetermined degree whereby auxiliary bellows operatively connected with said main bellows and a connection extending between said outlet and said auxiliary bellows and through which a fluid agent controls the actuation of the latter, the expansion of said auxiliary bellows collapsing the main bellows against the pressure therein, whereby the valve is moved toward its closed position.

2. The combination of a valve casing having an inlet and an outlet, a valve in said casing controlling the communication between said inlet and outlet, a stationary yoke carried by said valve casing, a main bellows supported upon said stationary yoke, and inflated to a predetermined degree, an auxiliary bellows located within and engaging said stationary yoke and expansible toward said main bellows, a valve stem connected with said valve, a movable yoke carrying said valve stem and extending transversely of said stationary yoke and between said bellows, said movable yoke being engaged from opposite directions by said bellows and being movable by said main bellows to open said valve to an extent corresponding to the pressure in said main bellows, a thermostatic device in said valve outlet, and a connection from said thermostatic device to said auxiliary bellows controlling the actuation of the latter, the expansion of said auxiliary bellows moving the movable yoke against the resistance interposed by said main bellows whereby the valve is moved toward its closed position.

In testimony whereof I have hereunto set 111 hand.

y ALFRED ROE'SC'H. 

